The forming process of the flexible ultrathin glasses(UTG)prepared by the redrawing method was numerically simulated using ANSYS Polyflow software.In the forming process by the redrawing method,temperature,viscosity,t...The forming process of the flexible ultrathin glasses(UTG)prepared by the redrawing method was numerically simulated using ANSYS Polyflow software.In the forming process by the redrawing method,temperature,viscosity,transverse and longitudinal velocity distribution of the glasses with different compositions were studied.Furthermore,the influence of these factors on the width and thickness of the flexible glass plate was investigated.It is found that the internal and external heat exchange of glass has a dominant influence on the viscosity variation during the UTG forming process,which is inconsistent with the general viscosity-temperature dependence.The glass that first reaches the lower limit of forming viscosity can significantly resist the shrinking effect caused by surface tension,making the glass wider during the forming.If the original glass width remains unchanged,the glass thickness or feeding speed is reduced,wider and thinner flexible glasses can be produced.展开更多
This paper explores the relationship between costume history research and the redrawing of frescoes of Dunhnang Grottoes. Redrawing frescoes could provide evidences for costume history research, and the research can c...This paper explores the relationship between costume history research and the redrawing of frescoes of Dunhnang Grottoes. Redrawing frescoes could provide evidences for costume history research, and the research can correspondingly help the rodrawing. Redrawing frescoes, for the purpose of costume history study, must comply with some specific rules, which are different from those of other studies. The present study also discusses the methods to distinguish, the original fresco colors that have faded or changed after more than one thousand years.展开更多
A new threshold means more than 100 million impoverished people will be eligible for government assistance as China continues to battle poverty The Chinese Government has decided to set the nation’s poverty line at a...A new threshold means more than 100 million impoverished people will be eligible for government assistance as China continues to battle poverty The Chinese Government has decided to set the nation’s poverty line at an annual per-capita net展开更多
为了考察材料各向异性对钢制薄壁容器D/t=513.7(易拉罐)罐身的冲杯及复冲过程成形的影响,采用不同的各向异性材料,利用ANSYS/LS-DYNA模拟冲杯及复冲过程,得到具有不同材料属性的变形结果,将对DI(Drawn and Ironed)材的开发提供方向性的...为了考察材料各向异性对钢制薄壁容器D/t=513.7(易拉罐)罐身的冲杯及复冲过程成形的影响,采用不同的各向异性材料,利用ANSYS/LS-DYNA模拟冲杯及复冲过程,得到具有不同材料属性的变形结果,将对DI(Drawn and Ironed)材的开发提供方向性的指导。展开更多
基金the National Key Research and Development Program of China(No.2022YFB3603300)。
文摘The forming process of the flexible ultrathin glasses(UTG)prepared by the redrawing method was numerically simulated using ANSYS Polyflow software.In the forming process by the redrawing method,temperature,viscosity,transverse and longitudinal velocity distribution of the glasses with different compositions were studied.Furthermore,the influence of these factors on the width and thickness of the flexible glass plate was investigated.It is found that the internal and external heat exchange of glass has a dominant influence on the viscosity variation during the UTG forming process,which is inconsistent with the general viscosity-temperature dependence.The glass that first reaches the lower limit of forming viscosity can significantly resist the shrinking effect caused by surface tension,making the glass wider during the forming.If the original glass width remains unchanged,the glass thickness or feeding speed is reduced,wider and thinner flexible glasses can be produced.
文摘This paper explores the relationship between costume history research and the redrawing of frescoes of Dunhnang Grottoes. Redrawing frescoes could provide evidences for costume history research, and the research can correspondingly help the rodrawing. Redrawing frescoes, for the purpose of costume history study, must comply with some specific rules, which are different from those of other studies. The present study also discusses the methods to distinguish, the original fresco colors that have faded or changed after more than one thousand years.
文摘A new threshold means more than 100 million impoverished people will be eligible for government assistance as China continues to battle poverty The Chinese Government has decided to set the nation’s poverty line at an annual per-capita net
